Extrapolation

This problem contains basic test cases for one or more Abaqus elements and features.

This page discusses:

ProductsAbaqus/Standard

Elements tested

B21

B31

CPS4

M3D4

S4R

T2D2

Features tested

Linear extrapolation, parabolic extrapolation, and suppression of extrapolation are tested.

Problem description

These tests verify the performance of extrapolation for structural and continuum elements used in models subjected to an in-plane rotation of 45°. For elements that do not have rotation degrees of freedom, beam elements are used to connect the elements to the point of rotation. The restart test verifies that the solution history information required for the extrapolation algorithm is transferred correctly to a restarted analysis.

Results and discussion

In all cases the results indicate that this option performs as expected. When parabolic extrapolation is used, there is a speedup in computational time compared to linear extrapolation. The restart analysis results are identical to those for the original analysis from which the restart was run.

Input files

xstebeam.inp

Beam (B31) elements with parabolic extrapolation.

xstecon.inp

Continuum (CPS4) and beam (B31) elements with linear extrapolation.

xstememb.inp

Membrane (M3D4) and beam (B31) elements with parabolic extrapolation.

xsteshel.inp

Shell (S4R) element with parabolic extrapolation.

xsteshre.inp

Restart of xsteshel.inp without terminating the current step in the analysis from which the restart is made.

xstetrs.inp

Truss (T2D2) and beam (B21) elements with parabolic extrapolation.